John Locke's suicide note was given to Jack by Eloise Hawking when she spoke to him in private at The Lamp Post. It was a handwritten note in an envelope addressed to Jack Shephard. The note read only:
Jack originally refused to read the note, putting it in Locke's casket after he put Christian's shoes on him while in Simon’s Butcher Shop. However, the note was given back to him on the plane by Rupa Krishnavani after it was found by the airline security when they were screening his cargo. Jack eventually read the note after a conversation with Ben where he asked Jack if he blamed himself for Locke's suicide. After reading the note on, the plane encounters turbulence and the plane is engulfed in a flash of white light. Jack then wakes up on the Island.